T:Mode$ ChangesZone | Origin$ Any | Destination$ Battlefield | ValidCard$ Card.Self | Execute$ TrigSac | TriggerDescription$ When CARDNAME enters the battlefield, sacrifice it unless an opponent was dealt damage this turn.
T:Mode$ DamageDoneOnce | ValidSource$ Card | ValidTarget$ Opponent | TriggerZones$ Battlefield | Execute$ TrigPutCounter | TriggerDescription$ Whenever an opponent is dealt damage, put that many +1/+1 counters on CARDNAME.
Oracle:When War Elemental enters the battlefield, sacrifice it unless an opponent was dealt damage this turn.\nWhenever an opponent is dealt damage, put that many +1/+1 counters on War Elemental.